42
a.
No. Replace relay.
b.
Yes. Continue.
5.
Is the motor overload relay tripped?
a.
Yes. Determine cause, rectify and reset.
b.
No. Continue.
6.
Is the motor starter energized?
a.
No. There is an open or break in the wiring. Determine cause and
rectify.
b.
Yes. Check motor and motor wiring.
ALARM CODE:
Check Airflow Switches
PROBLEM:
The controller has activated the unit enable output to start the fan,
and detected that the fan is running from a signal at the fan status input. Subsequently, the
controller has detected several short momentary openings of the fan status input. The
momentary openings must occur at least 4 times within 15 seconds. This alarm requires
the operator to correct the condition and reset the alarm before normal unit operation
resumes.
SOLUTION: If high airflow switch is opening. Do not adjust the switch setpoints
1.
Are all of the filters in place?
a.
No. Install filters and continue.
b.
Yes. Continue.
2.
Does the external static pressure match that listed on the rating plate?
a.
No. Verify all associated ductwork is installed and continue.
b.
Yes. Continue.
3.
Does the fan RPM match that listed on the Spec. Sheet?
a.
No. Correct to reduced fan speed and continue.
b.
Yes. Continue.
4.
Are the airflow switches’ sensing tubes obstructed?
a.
Yes. Clear and continue.
b.
No. Continue.
5.
Contact factory.
SOLUTION: If low airflow switch is opening. Do not adjust the switch setpoints
1.
Does low airflow switch open when the burner is off
a.
No. Disconnect both pressure sensing tubes from one of the airflow
switches and measure the differential pressure by connecting the high
sensing port of a manometer to one of the airflow sensing tubes and
the low sensing port to the other. Is the differential pressure
approximately the midpoint between the high and low airflow switch
setpoints?
1)
No. Close the profile opening until the differential pressure is
approximately the midpoint between the high and low airflow
switch setpoints. Reconnect the sensing tubes, restart the
burner, and verify the airflow switch remains closed when the
burner is at the maximum rated input. Continue.
2)
Yes. Continue.
2.
Are all of the filters dirty?
a.
Yes. Install clean filters and continue.
b.
No. Continue.
3.
Does the external static pressure match that listed on the rating plate?
Содержание AireLogic
Страница 1: ...1 AireLogic Digital Control System User Manual Rev 04 11 13...
Страница 53: ...53 Appendix I 10K Thermistor Output Curve...
Страница 54: ...54 Appendix II Airflow Station Layout...
Страница 59: ...59 Typical Wiring Schematic RECIRCULATING WDF MODEL DIAGRAM...
Страница 60: ...60 NON RECIRCULATING WDF MODEL DIAGRAM...
